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Plate Tectonics

QuestionAnswer
What type of boundary happens when plates slide past each other? Transform boundary
What type of boundary happens when plates pull apart from each other? Divergent boundary
What type of boundary happens when plates collide with each other? Convergent boundary
What force is at work in a transform boundary? Shearing Force
What force is at work in a divergent boundary? Tensional Force
What force is at work in a convergent boundary? Subduction / Crumpling
Who was the scientist who introduced proof of plate tectonics? Alfred Wegener
Which type of plate is more dense? Oceanic plates
Which type of plate is less dense? Continental plates
Three pieces of evidence for plate tectonics? Paleomagnetism and magnetic pole reversal, Continents fit together like a puzzle, glacial striations in South Africa.
Three more pieces of evidence for plate tectonics? Fossils in different parts of the world that match, Glacial Deposits, Similarity of mountain ranges (Appalachian and mountains in Europe/Greenland)
What was the united super continent called? Pangea
About how often do the magnetic poles reverse? Roughly 300,000 years
What is seafloor spreading? The formation of new oceanic crust via hotspots
Major plates? Eurasian, North American, South American,
Major plates continued? Antarctic, Pacific, African, Indian-Australian,
What is the ring of volcanoes that surrounds the Pacific plate called? The Ring of Fire
What percentage of Earth's earthquakes occur in the Ring of Fire? 90%
Earth's layers in order? Crust, Lithosphere, Asthenosphere, Mantle, Outer Core, Inner Core
What are the areas where oceanic crust is sinking beneath continental crust called? Subduction Zones
Created by: bs0923038
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